Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62509807f30db5d…

MALICIOUS

PDF

71.9 KB Created: 2021-02-06 08:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c179b4f35884ffc5f2720cab781ecaed SHA-1: d0fb13a3a762b018ebc7a45c0f2d7dab75c4ae4b SHA-256: e62509807f30db5dc201728f925a91f0c17e99dd9a4abc1aa92afb3e37a0348b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://baarspo.ru/wb?keyword=digestive%20system%20organs%20and%20functions%20worksheet PDF link annotation
    • https://cdn.sqhk.co/bidelefo/xhdm5ag/35029695810.pdfIn PDF document text
    • https://cdn.sqhk.co/wavoperusina/ajevial/doordash_food_delivery_driver_app.pdfIn PDF document text
    • https://cdn.sqhk.co/vabedesi/hicygg9/egg_inc_prestige_formula.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/hhhihyR/relic_runway_friv.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/5fQeMgd/85438620604.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/749893.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/sYoghge/xoregegipolonitunu.pdfIn PDF document text
    • https://cdn.sqhk.co/rapenikidu/jaYjfie/45462837137.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/BAzjjjb/mobile_wallet_defined.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458389/normal_5fc9e576263ae.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/kUi2gdp/makuratejutiwuwelawidik.pdfIn PDF document text
    • https://cdn.sqhk.co/xokunafuse/dLKhahj/robot_shark_attack_transform_robot_shark_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/1icific/kukazew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/72625872314.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/36457992856.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE3 5720 bytes
SHA-256: 51c61e9cbb6550a432c926a934aa77bd84d8bf37f1aae65dedfbc770ee191dd5
font_01_sfnt_off0000ee5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5C 10636 bytes
SHA-256: d3a1e8ddd5406992ae3aee125d35fb6ffb867eba7e9dc752dc4045a6a4fb7980